What is 72,76 values in ReportConfigInterRAT- B2-UTRA(-72, -76) IE plz explain in detail?

Question

ENB will include only UTRA objects or both EUTRA and UTRA objects in meas config for UE to send measurement reports during IRAT HO ???

Answer 1

Both the events B1 and B2 are associated with InterRAT measurement reporting configuration.
B2-UTRA (-72, -76) are telling about event B2 threshold 1 and threshold2 values respectively.
Since threshold1 represents ThresholdEUTRA which will be a RSRP value while threshold2 represents ThresholdUTRA which will be utra-RSCP ( Received Signal code power).

Please go through the following information which will help you to understand.

ReportConfigInterRAT ::=            SEQUENCE {
    triggerType                         CHOICE {
        event                               SEQUENCE {
            eventId                             CHOICE {
                eventB1                             SEQUENCE {
                    b1-Threshold                        CHOICE {
                        b1-ThresholdUTRA                    ThresholdUTRA,
                        b1-ThresholdGERAN                   ThresholdGERAN,
                        b1-ThresholdCDMA2000                ThresholdCDMA2000
                    }
                },
                eventB2                             SEQUENCE {
                    b2-Threshold1                       ThresholdEUTRA,
                    b2-Threshold2                       CHOICE {
                        b2-Threshold2UTRA                   ThresholdUTRA,
                        b2-Threshold2GERAN                  ThresholdGERAN,
                        b2-Threshold2CDMA2000               ThresholdCDMA2000
                    }
                },
                ...
            },
            hysteresis                      Hysteresis,
            timeToTrigger                   TimeToTrigger
        },
        periodical                              SEQUENCE {
            purpose                                 ENUMERATED {
                                                        reportStrongestCells,
                                                        reportStrongestCellsForSON,
                                                        reportCGI}
        }
    },
    maxReportCells                      INTEGER (1..maxCellReport),
    reportInterval                      ReportInterval, 
    reportAmount                        ENUMERATED {r1, r2, r4, r8, r16, r32, r64, infinity},
    ...,
    [[  si-RequestForHO-r9                  ENUMERATED {setup}      OPTIONAL    -- Cond reportCGI
    ]],
    [[  reportQuantityUTRA-FDD-r10          ENUMERATED {both}       OPTIONAL    -- Need OR
    ]],
    [[  includeLocationInfo-r11             BOOLEAN                 OPTIONAL    -- Need ON
    ]]
}

ThresholdUTRA ::=                   CHOICE{
    utra-RSCP                           INTEGER (-5..91),
    utra-EcN0                           INTEGER (0..49)
}

Comments

will u tel me why we are mentioning ThresholdEUTRA threshold in event B2.Event B2 is not related to eutra na?

---

Event B2:    PCell becomes worse than absolute threshold1 AND Neighbour becomes better than another absolute threshold2.

This is what definition written in specification. PCell is always a cell through which UE is connected to network. And the PCell is a E-UTRAN cell .